Ln3+ post-functionalized metal–organic frameworks for color tunable emission and highly sensitive sensing of toxic anions and small molecules

作者: Ji-Na Hao , Bing Yan

DOI: 10.1039/C5NJ03419A

关键词:

摘要: A facile strategy was put forward to fabricate highly luminescent metal–organic frameworks (MOFs) with tunable and white-light emission by incorporating lanthanide cations (Ln3+) into the channels of MIL-121 (Al(OH)(H2btec)·H2O) whose uncoordinated carboxyl groups can act as post-synthetic modification sites. The intense luminescence Ln3+ doped indicates that framework rigid, permanently porous structure non-coordinated serve both a scaffold an antenna for hosting sensitizing cations. Moreover, fine-tuning emitted color be easily achieved simply modulating doping ratio or adjusting excitation wavelength. Notably, red–green–blue-based white light emitting Ln-MOFs realized simultaneously Eu3+ Tb3+ host framework. In addition, because excellent structural stability functionalized (Ln3+@MIL-121) in water solvents, Eu3+@MIL-121 developed probe sensing anions aqueous solutions small organic molecules. Luminescent studies reveal not only display high-sensitivity function respect fluoride dichromate ions but also exhibit significant solvent-dependent response small-molecule pollutants, such chloroform acetone.

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